Three subtractive colours used in inkjet printers to form a colour photo. All three are combined to produce black but the result is quite muddy so a separate black ink is included to improve density.

The four colors of ink that are used in "four color process" printing to create the appearance of a photographic or full color. Black is added to compensate for the lack of purity in [..]

The primary colours of the halftone printing process.

The subtractive primaries, or process colors, used in color printing, also used to describe the printing process itself.

The color model usually employed in printing technology which uses the basic colors cyan, magenta and yellow. Black is used to ensure a visually satisfying black tone.